Santorio Santorio created the first thermometer. He was the first inventor to include a numerical scale on a device that measured changes in degrees of hotness or coolness. The thermometer he invented was the first designed to take a person's temperature.Continue Reading
Earlier versions of the thermometer were called thermoscopes. They could indicate whether there was a change in temperature, but they could not measure the degree to which the temperature had changed.
Daniel Fahrenheit is credited with inventing the first modern thermometer. He invented an alcohol thermometer in 1709, and he invented the mercury thermometer in 1914. He also developed the first widely accepted scale used to measure temperature.Learn more about Inventions
The Henry 30-30 Golden Boy rifle is a modern lever-action repeating hunting rifle produced by Henry Repeating Arms. As of 2015, Henry no longer produces Golden Boy rifles in 30-30 caliber, though it offers other 30-30 caliber rifles and Golden Boy models.Full Answer >
J.P. Lemiere invented the first "binocular telescope" in 1825. A binocular is an instrument that provides a magnified view of far-away objects and consists of two similar telescopes, one for each eye, mounted in a single frame.Full Answer >
The discovery of helium on Earth was made in the United Kingdom by Scottish chemist Sir William Ramsay in 1895. However, the element was first discovered on the sun by French astronomer Pierre Janssen.Full Answer >
Superconductivity was discovered by Heike Kammerlingh Onnes in 1911. This discovery eventually made maglev trains possible. Superconductivity is the cooling of materials, such as lead and mercury, to extremely low temperatures to eliminate the materials' resistance to electrical conduction. This allows more electrical amperage to move through the conductor.Full Answer >